Get a black magic marker(make sure its black and not purple)
and some WD40 or Duralube lightly touch the siver spots with the marker, let dry, hit with a little duralube, wipe off, and you would be very hard pressed to ever tell it was there. Bigger jobs I use a mini air brush. but that gets pretty complicated and takes a little practice. I have sometimes had some luck with "scratch away" stuff they sell for use on cars, but they have to be very light scratches for it to work. Great tuner, enjoy.
and some WD40 or Duralube lightly touch the siver spots with the marker, let dry, hit with a little duralube, wipe off, and you would be very hard pressed to ever tell it was there. Bigger jobs I use a mini air brush. but that gets pretty complicated and takes a little practice. I have sometimes had some luck with "scratch away" stuff they sell for use on cars, but they have to be very light scratches for it to work. Great tuner, enjoy.